Feeler gauge with handle



Aug. 27, 1929. A. sTl-:lNLE 1,726,129

FEELER GAUGE WITH HANDLE med April 2o, 1927 /nvenon Patented Aug. 27, 1929.

UNITED STATES l 1 1,726,129 ATENT OFFICE.

.ADOLF STE-INLE, 0F JENA, GERMANY, ASSIGNOR T0 CARL ZEISS, 0F A FIRM.

JENA, GERMANY,

IFEELEIR.A GAUGE WITH HANDLE.

Application led April 20, 1927, Serial No. 185,338, and in Germany April 21, 1926.

`When using feeler gauges with handle and two feeling members disposed opposite each other, of which one acts against spring pressure upon an indicating device, there may easily arise errors in measurement owing to a restless attitude of the hand. to the present invention this drawback may be obviated by rendering the handle rotatable on 'the gauge. 'lhe'advantage of the new feeler gauge is particularly conspicuous if the feeling members of the gauge, on being used, are in contact with the body' to be tested not only in a point but along a line or even on a surface as is frequently the case with feeler gauges for testing the pitch of toothed wheels. When using a gauge having a lirm handle, possibly by the unavoidf l able unrest of the users hand the feeling members and the teeth temporarily would touch each .other in single points only instead of touching each other in contact lines or contact surfaces. Consequently either the result of the test would be wrong or at least uncertain owing to the oscillations of the indicating device caused by the unrest of the hand. A feeler gauge of this kind constructed according to the invention obviates thisv drawback, especially if the axis of rotation of the handle be perpendicular to the direction of measurement and if the gauge be substantially constructed symmetrically with respect to two planes intersecting in this axis of rotation and being perpendicular to each other.

The annexed drawing shows as a constructional example av feeler gauge for testing gears according to the present invention. Fig. 1 shows the gauge in an elevation, partly in a section and Fig. 2 is a side elevation.

On a gauge cylindrical body w is disposed perpendicular to its axis a carriage. guide b, carrying'a feeling member c and a carriage el. The latter, on which is fixed a second feeling member e, is under the action of two springs f which tend to displace it soas to approach the feeling member c. The gauge body a isprovided with a casing g containing an indicating device, the casing being symmetrically constructed with respect to two planes, intersecting in its axis and per-v pendicular to each other. To thisindicating device appertains an index h, indicating on a scale i the position of the feeling member e relatively to the feeling member c. On the gauge body a a roughened handle la is According' supported rotatably on balls Z about the axis of the gauge body a.

The carriage el has an extension d1, projecting into the interior of the gauge body a. 0n this extension 1 acts a steel band n, guided over two rollers 0l and o2 and enclosing a roller p, which is rigidly connected to theindex i, and rotatably supported in the casing g. The free endpof the steel band n is fixed on a draw Spring g whose elasticity is smaller than that of the spring f and which acts on a pin 1' fixed in the gauge body a. t When the feeler gauge is in use, the feeling members c ande bear under the action of the springs f with their whole width along a surface line against the profiles of one or several teeth of a wheel m and thus afford a reliable reading of the distance apart of these two surface lilies on the scale c' lby means of the index 'h because the unavoidably restless attitude of the hand of the user, seizing the handle, only causes rotationsv of this handle c about the axis of the gauge body a without exerting momenta of rotation upon the gauge body a itself.

I claim:

1. A feeler gauge containing a casing, two feeling members fitted ou the casing, at least one of the two feelingmembers being movably disposed 4with respect to said casing, a scale and an index on said casing, coacting with each other and displaceable relatively to each other, means containing a spring arrangement and adapted to convert a relative displacement of the feelingmembers into a relative displacement of the scale and the index, and a handle rotatably mounted on the casing.

2. A feeler gauge containing a casing, two 9 feeling members fitted .on the casing, at least one of the two feeling members being movably disposed with respect to saidV casing, a scale and an index on said casing, coacting with each other and displaceable relatively to each other, means containing a vspring arrangement and adapted to convert a relative displacement of the feeling members into av relative displacement of the scale and the index, and a handle mounted on the casing rotatable about an axis perpendicular to the direction in which the two feeling members are-movable relatively to each other.

two feeling members fitted on the casing, at least .one of the tvvo feeling members being movably disposed with respect to said casing, a scale and an index on said casing', coactng with each other and displaceable relatively to each other, means containing a spring arrangement and adapted to convert a relative displacement of the feeling members into a relative displacement of the scale and the index, Aand a handle mounted 10 on the casing rotatable about an axis, perpendicular to the direction in which the two feeling members are movable relatively. to each other, the casing being symmetrical with respect to two planes, which perpen- 15 dicularly intersect in this axis of rotation.

ADOLF STEINLE. 

